A FRAMEWORK FOR MODELING MEDICAL DIAGNOSIS AND DECISION SUPPORT SERVICES Sankha Amarakoon 1 , Ajantha Dahanayake 2 , Bernhard Thalheim 3 1 Rotterdam Ophthalmologic Institute, Rotterdam, the Netherlands. S,Amarakoon@oogziekenhuis.nl 2 Prince Sultan University, Dept. of CIS, Riyadh, Kingdom of Saudi Arabia. adahanayake@pscw.psu.edu.sa 3 Christian-Albrechts-University, Dept. of Computer Science, 24098 Kiel, Germany. thalheim@is.informatik.uni-kiel.de ABSTRACT This paper introduces a framework and a service model improving the understanding of domain requirements acquisition for IT-service systems development. The service model fills the gap in domain specific requirements elicitation through its base in the classical rhetorical frame introduced by Hermagoras of Temnos and through the interpretation of the domain in terms of service offerings. The model is validated by a real-life situation – to establish an ophthalmologic Disease Diagnosis Decision Support Network (DDDSN) for age-related macular degeneration (ARMD) treatments. KEYWORDS Requirements Modeling, Service Systems (IT), Cross-Disciplinary Application Development, Specification Frame, Age Related Macular Degeneration, Medical Diagnosis Decision Support, Service Model 1 INTRODUCTION The field of Information Systems (IS) is shifting towards advanced and cross- disciplinary IT-service systems engineering. For example, Medical, Environmental, Disaster Recovery, Life-Science, etc., are such domains that largely invest on advanced cross-disciplinary IT-service systems. The implication of this shift is that those IT-service systems are then subject to evaluations of systems functioning based on its trustworthiness, flexibility to change, and efficient manageability and maintainability. Those systems development endeavors demand their developers to understand the systems functioning within its domain of usage and its service. Today, organizations opt to define, develop and deploy cross- disciplinary IT-service systems, making those resulting applications available for end users to amalgamate or mash-up those into end-user-situational services in ways that the developers may not originally envision [1]. 1.1 IT Service Systems IT service systems combine and integrate the value created in different design contexts of; person-to-person encounters, technology enabled self-service, computational services, multi-channel, multi-device, and location- based and context-aware services [2]. There is a substantial subset of IT service systems that can be described as “information- intensive”, and it takes a more abstract view of service contexts that highlights what person-to-person, self-service, and automated or computational services are. The IT-service system view reveals the intrinsic design challenges that derive from the nature of the information required to perform a service, and emphasizes the design choices that allocate the responsibility to provide this information between the service provider and service consumer. Taken together, the information requirements and the division of labor for satisfying them determine the nature and International Journal of Digital Information and Wireless Communications (IJDIWC) 2(4): 7-26 The Society of Digital Information and Wireless Communications, 2012 (ISSN: 2225X-658X) 7